RU167207U1 - DRUM-SIDE ASYNCHRONOUS ELECTRIC MACHINE - Google Patents

Abstract

An end-face asynchronous electric machine comprising a housing, a stator, a stator winding, two rotors with squirrel-cage windings located on both sides of the stator and installed in rolling bearings, characterized in that the stator core is made up of two ring modules with radial grooves installed on two sides of a cylindrical module with axial grooves in which a single three-phase winding is laid, and glass-shaped rotors covering the stator with an air gap are also made integral from disks with radial rods and cylinders with axial rods and short-circuiting rings on the disk and cylindrical parts.

Description

The utility model relates to the field of electrical engineering and electrical engineering, namely to the designs of end-face asynchronous machines with one stator and two rotors.

A known end-face electric machine [1] (analogue) with a stator fixed in a housing facing working surfaces to two disk-shaped rotors mounted on a shaft in rolling bearings. The stator is made of two halves, in each of which a distributed winding is made in the form of winding modules and a yoke wound from a steel tape mounted on opposite sides of the stator disk. Permanent magnets mounted on pole rotors are mounted on rotor disks from the side of the working surfaces of the stator.

The main disadvantage of this design is the complexity and complexity of mounting the winding modules on the yoke of the stator disks; the large mass and dimensions of the machine due to the presence of two stator yokes.

The closest in combination of features (prototype) is an end electric machine [2], comprising a housing, a stator, a stator winding, two rotors with squirrel-cage windings located on both sides of the stator and installed in rolling bearings.

The disadvantages of the above devices include:

1. insufficient specific power by weight,

2. increased material consumption of the stator core,

3. increased magnetic flux scattering of the stator windings.

The utility model is based on the task of improving the design of the machine in order to reduce the scattering flux of the stator windings, reduce the material consumption of the stator core and, as a result, increase the specific power by mass.

This is achieved by the fact that the stator core is made up of two ring modules with radial grooves installed on both sides of the cylindrical module with axial grooves, in which a single three-phase winding is laid, and glass-shaped rotors covering the stator with an air gap are also made of disks with radial rods and cylinders with axial rods and short-circuiting rings on the disk and cylindrical parts.

The reduction of the magnetic flux of the scattering of the stator windings is due to the fact that the plane of the stator windings is not in the transverse plane and the winding is not divided into two parts, as in the prototype, but is located in the axial plane and the three-phase winding is made unified. The reduction in material consumption is provided due to the fact that the stator composite core is made in the form of a hollow cylinder. The increase in the specific power of the machine is also provided due to the fact that the glass-like rotors, covering the stator core, interact not only with the radial parts of the stator winding, but also with the drum part, as in a conventional asynchronous machine.

The technical nature of the device is illustrated in FIG. 1, 2, 3. In FIG. 1 shows a longitudinal section through a drum-end asynchronous electric machine. The machine contains a composite core of the stator 1 mounted in the housing 2 by means of bushings 10 and fixing bolts 11, as well as two composite glass-shaped rotors 3, mounted on the shaft 4, in bearings 5 of the bearing shields 6 and 7. A single three-phase winding 12 is laid sequentially in radial grooves of one disk part 8 of the stator core, then into the longitudinal grooves of the cylindrical part 9 of the stator core, then into the radial grooves of the other disk part and so on. In this case, the frontal parts of the winding 13 are fixed in the inner bore of the stator core. In FIG. 2 shows an isometric view of the stator core, where 8 are the disk parts of the stator core, and 9 is the cylindrical part of the stator core. In FIG. Figure 3 shows a fragment of a machine with a glass-like rotor 3, where 14 is the disk part of the rotor made of ferromagnetic material, 15 is the cylindrical part of the rotor made of ferromagnetic material, 16 are short-circuit rings, 17 are winding rods of conductive material.

The machine can work both in engine mode and in generator mode. The machine in asynchronous motor mode operates as follows. The three-phase current flowing through the three-phase winding 12 of the stator core 1 creates a rotating magnetic field that induces an electromotive force in the short-circuited windings of the cup-shaped rotors 3, which leads to the appearance of current in them. When the rotor current interacts with a rotating magnetic field, an electromagnetic moment is created that drives the rotors. The rotational speed of the rotors 3 is determined by the number of pole pairs and the frequency of the supply voltage, and the starting methods are generally accepted for induction motors.

There are no fundamental differences in the interaction of the main elements of the machine in the asynchronous generator mode from the mode described above.

The use of such a machine design reduces material consumption, reduces the scattering flux of the winding, increases the specific power of the machine, which indicates the solution of the problem

Literature

1. RF patent №2246168, IPC ⁷ Н02K 21/24. End electric machine. Authors: Vstovsky A.L. (RU), Golovin M.P. (RU), Golovina L.N. (RU), Vstovsky S.A. (RU), Kuzmin S.S. (RU), Supey V.A. (RU). Patent holder: Krasnoyarsk State Technical University (KSTU) (RU).

2. RF patent 2313888, IPC Н02K 21/24, Н02K 21/12, Н02K 16/02. End electric machine. Authors: Vstovsky Alexey Lvovich (RU), Golovin Mikhail Petrovich (RU), Poloshkov Nikolai Evgenievich (RU), Golovina Lyudmila Nikolaevna (RU), Kokov Sergey Alexandrovich (RU). Patent holder: State educational institution of higher professional education Krasnoyarsk State Technical University (KSTU) (RU).

Claims (1)

An end-face asynchronous electric machine comprising a housing, a stator, a stator winding, two rotors with squirrel-cage windings located on both sides of the stator and installed in rolling bearings, characterized in that the stator core is made up of two ring modules with radial grooves installed on two sides of a cylindrical module with axial grooves in which a single three-phase winding is laid, and glass-shaped rotors covering the stator with an air gap are also made integral from disks with radial rods and cylinders with axial rods and short-circuiting rings on the disk and cylindrical parts.

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